Chameleon-Photon Mixing in a Primordial Magnetic Field
arXiv:1003.0232 · doi:10.1103/PhysRevD.82.044033
Abstract
We consider the non-resonant mixing between photons and scalar ALPs with masses much less than the plasma frequency along the path, with specific reference to the chameleon scalar field model. The mixing would alter the intensity and polarization state of the cosmic microwave background (CMB) radiation. We find that the average modification to the CMB polarization modes is negligible. However the average modification to the CMB intensity spectrum is more significant and we compare this to high precision measurements of the CMB monopole made by the far infrared absolute spectrophotometer (FIRAS) on board the COBE satellite. The resulting 95\% confidence limit on the scalar-photon conversion probability in the primordial field (at 100 GHz) is P < 2.6x10^{-2}. This corresponds to a degenerate constraint on the photon-scalar coupling strength, g, and the magnitude of the primordial magnetic field. Taking the upper bound on the strength of the primordial magnetic field derived from the CMB power spectra, B < 5.0x10^{-9}G, this would imply an upper bound on the photon-scalar coupling strength in the range g < 7.14x10^{-13}GeV^{-1} to g < 9.20x10^{-14}GeV^{-1}, depending on the power spectrum of the primordial magnetic field.
12 pages, 2 figures; updated to reflect published version
References in corpus (15)
- Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
- On the Origin of Cosmic Magnetic Fields
- Evading Equivalence Principle Violations, Cosmological and other Experimental Constraints in Scalar Field Theories with a Strong Coupling to Matter
- Environmental Dependence of Masses and Coupling Constants
- Strongly Coupled Chameleon Fields: New Horizons in Scalar Field Theory
- Cosmology with inhomogeneous magnetic fields
- Compatibility of the chameleon-field model with fifth-force experiments, cosmology, and PVLAS and CAST results
- Detecting Chameleons: The Astronomical Polarization Produced by Chameleon-like Scalar Fields
- Testing Chameleon Theories with Light Propagating through a Magnetic Field
- Faraday Rotation Limits on a Primordial Magnetic Field from WMAP Five-Year Data
- The Cosmic Microwave Background and the Ionization History of the Universe
- The Effect of a Chameleon Scalar Field on the Cosmic Microwave Background
- Supernova Brightening from Chameleon-Photon Mixing
- Numerical simulations of the decay of primordial magnetic turbulence
- The Cosmological Evolution of the Average Mass Per Baryon